Due to restricted deployment Windows and the availability of users to participate in acceptance testing, deployment dates were limited and usually decided early in the concept phase.

由于部署窗口和参与验收测试的有效用户是有限的，所以部署日期也受到限制，而且通常在制定概念阶段早期就确定了。

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If the commands you're testing produce a lot of output, redirect it so that you can read both start and stop dates. Calculate the difference between the two dates.

如果您所测试的这些命令产生了大量的输出，可以对其进行重定向，以便能够阅读到开始和停止日期。

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Schuchat urged the public not to be alarmed if expiration dates for some of the liquid Tamiflu have passed, because the Food and Drug Administration extended them "after careful testing" to ensure they are safe and effective.

CNN: H1N1 vaccine on schedule, official says